From 6611db502aafc9768254efb45495a9fb20a79c81 Mon Sep 17 00:00:00 2001 From: Ayush Date: Tue, 6 Oct 2015 00:44:05 +0530 Subject: Git: removed some clutter --- git.html.markdown | 68 ++++++++++++++++++++++++++++++------------------------- 1 file changed, 37 insertions(+), 31 deletions(-) diff --git a/git.html.markdown b/git.html.markdown index bf8fce0c..3b83218c 100644 --- a/git.html.markdown +++ b/git.html.markdown @@ -8,17 +8,17 @@ contributors: filename: LearnGit.txt --- -Git is a distributed version control and source code management system. +Git is a distributed version control and source code management system. -It does this through a series of snapshots of your project, and it works -with those snapshots to provide you with functionality to version and +It does this through a series of snapshots of your project, and it works +with those snapshots to provide you with functionality to version and manage your source code. ## Versioning Concepts ### What is version control? -Version control is a system that records changes to a file, or set of files, over time. +Version control is a system that records changes to a file(s), over time. ### Centralized Versioning VS Distributed Versioning @@ -42,8 +42,9 @@ Version control is a system that records changes to a file, or set of files, ove ### Repository -A set of files, directories, historical records, commits, and heads. Imagine it as a source code data structure, -with the attribute that each source code "element" gives you access to its revision history, among other things. +A set of files, directories, historical records, commits, and heads. Imagine it +as a source code data structure, with the attribute that each source code +"element" gives you access to its revision history, among other things. A git repository is comprised of the .git directory & working tree. @@ -54,32 +55,33 @@ The .git directory contains all the configurations, logs, branches, HEAD, and mo ### Working Tree (component of repository) -This is basically the directories and files in your repository. It is often referred to -as your working directory. +This is basically the directories and files in your repository. It is often +referred to as your working directory. ### Index (component of .git dir) The Index is the staging area in git. It's basically a layer that separates your working tree -from the Git repository. This gives developers more power over what gets sent to the Git -repository. +from the Git repository. This gives developers more power over what gets sent +to the Git repository. ### Commit -A git commit is a snapshot of a set of changes, or manipulations to your Working Tree. -For example, if you added 5 files, and removed 2 others, these changes will be contained -in a commit (or snapshot). This commit can then be pushed to other repositories, or not! +A git commit is a snapshot of a set of changes, or manipulations to your Working +Tree. For example, if you added 5 files, and removed 2 others, these changes +will be contained in a commit (or snapshot). This commit can then be pushed to +other repositories, or not! ### Branch -A branch is essentially a pointer that points to the last commit you made. As you commit, -this pointer will automatically update and point to the latest commit. +A branch is essentially a pointer to the last commit you made. As you go on +committing, this pointer will automatically update to ooint the latest commit. ### HEAD and head (component of .git dir) HEAD is a pointer that points to the current branch. A repository only has 1 *active* HEAD. head is a pointer that points to any commit. A repository can have any number of heads. -###Stages of Git +### Stages of Git * Modified - Changes have been made to a file but file has not been committed to Git Database yet * Staged - Marks a modified file to go into your next commit snapshot * Committed - Files have been committed to the Git Database @@ -95,7 +97,7 @@ head is a pointer that points to any commit. A repository can have any number of ### init -Create an empty Git repository. The Git repository's settings, stored information, +Create an empty Git repository. The Git repository's settings, stored information, and more is stored in a directory (a folder) named ".git". ```bash @@ -144,8 +146,8 @@ $ git init --help ### status -To show differences between the index file (basically your working copy/repo) and the current -HEAD commit. +To show differences between the index file (basically your working copy/repo) +and the current HEAD commit. ```bash @@ -172,7 +174,8 @@ $ git add /path/to/file/HelloWorld.c $ git add ./*.java ``` -This only adds a file to the staging area/index, it doesn't commit it to the working directory/repo. +This only adds a file to the staging area/index, it doesn't commit it to the +working directory/repo. ### branch @@ -205,7 +208,8 @@ Updates all files in the working tree to match the version in the index, or spec $ git checkout # Checkout a specified branch $ git checkout branchName -# Create a new branch & switch to it, like: "git branch ; git checkout " +# Create a new branch & switch to it +# equivalent to "git branch ; git checkout " $ git checkout -b newBranch ``` @@ -268,7 +272,7 @@ $ git config --global alias.g "grep --break --heading --line-number" $ git grep 'variableName' -- '*.java' # Search for a line that contains "arrayListName" and, "add" or "remove" -$ git grep -e 'arrayListName' --and \( -e add -e remove \) +$ git grep -e 'arrayListName' --and \( -e add -e remove \) ``` Google is your friend; for more examples @@ -303,7 +307,7 @@ $ git merge --no-ff branchName ### mv -Rename or move a file +Rename or move a file ```bash # Renaming a file @@ -338,7 +342,7 @@ $ git pull origin master --rebase Push and merge changes from a branch to a remote & branch. ```bash -# Push and merge changes from a local repo to a +# Push and merge changes from a local repo to a # remote named "origin" and "master" branch. # git push # git push => implicitly defaults to => git push origin master @@ -347,23 +351,25 @@ $ git push origin master # To link up current local branch with a remote branch, add -u flag: $ git push -u origin master # Now, anytime you want to push from that same local branch, use shortcut: -$ git push +$ git push ``` ### stash -Stashing takes the dirty state of your working directory and saves it on a stack of unfinished changes that you can reapply at any time. +Stashing takes the dirty state of your working directory and saves it on a stack +of unfinished changes that you can reapply at any time. -Let's say you've been doing some work in your git repo, but you want to pull from the remote. -Since you have dirty (uncommited) changes to some files, you are not able to run `git pull`. -Instead, you can run `git stash` to save your changes onto a stack! +Let's say you've been doing some work in your git repo, but you want to pull +from the remote. Since you have dirty (uncommited) changes to some files, you +are not able to run `git pull`. Instead, you can run `git stash` to save your +changes onto a stack! ```bash $ git stash Saved working directory and index state \ "WIP on master: 049d078 added the index file" HEAD is now at 049d078 added the index file - (To restore them type "git stash apply") + (To restore them type "git stash apply") ``` Now you can pull! @@ -410,7 +416,7 @@ Now you're ready to get back to work on your stuff! [Additional Reading.](http://git-scm.com/book/en/v1/Git-Tools-Stashing) -### rebase (caution) +### rebase (caution) Take all changes that were committed on one branch, and replay them onto another branch. *Do not rebase commits that you have pushed to a public repo*. -- cgit v1.2.3 From 7b7ce666b66e897c115879d505104330923919ec Mon Sep 17 00:00:00 2001 From: Ayush Date: Tue, 6 Oct 2015 00:45:40 +0530 Subject: Git: added para for gitignore --- git.html.markdown | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/git.html.markdown b/git.html.markdown index 3b83218c..c32d9c5d 100644 --- a/git.html.markdown +++ b/git.html.markdown @@ -144,6 +144,16 @@ $ git commit --help $ git init --help ``` +### ignore (set of) files + +To intentionally untrack file(s) & folder(s) from git. Typically meant for +private & temp files which would otherwise be shared in the repository. +```bash +$ echo "temp/" >> .gitignore +$ echo "private_key" >> .gitignore +``` + + ### status To show differences between the index file (basically your working copy/repo) -- cgit v1.2.3 From 037ff22ef63c5f37b6657e806695bb52f46a7ec3 Mon Sep 17 00:00:00 2001 From: Ayush Date: Tue, 6 Oct 2015 00:46:53 +0530 Subject: Git: added more clone options --- git.html.markdown | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/git.html.markdown b/git.html.markdown index c32d9c5d..66b890c1 100644 --- a/git.html.markdown +++ b/git.html.markdown @@ -232,6 +232,10 @@ to a remote branch. ```bash # Clone learnxinyminutes-docs $ git clone https://github.com/adambard/learnxinyminutes-docs.git +# shallow clone - faster cloning that pulls only latest snapshot +$ git clone --depth 1 https://github.com/adambard/learnxinyminutes-docs.git +# clone only a specific branch +$ git clone -b master-cn https://github.com/adambard/learnxinyminutes-docs.git --single-branch ``` ### commit -- cgit v1.2.3 From e75a9e031bde60fae2c1972b5f6b18571acd4d99 Mon Sep 17 00:00:00 2001 From: Ayush Date: Tue, 6 Oct 2015 00:56:08 +0530 Subject: Git: added few random things --- git.html.markdown | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/git.html.markdown b/git.html.markdown index 66b890c1..e20a4b88 100644 --- a/git.html.markdown +++ b/git.html.markdown @@ -106,15 +106,12 @@ $ git init ### config -To configure settings. Whether it be for the repository, the system itself, or global -configurations. +To configure settings. Whether it be for the repository, the system itself, +or global configurations ( global config file is `~/.gitconfig` ). ```bash # Print & Set Some Basic Config Variables (Global) -$ git config --global user.email -$ git config --global user.name - $ git config --global user.email "MyEmail@Zoho.com" $ git config --global user.name "My Name" ``` @@ -249,6 +246,9 @@ $ git commit -m "Added multiplyNumbers() function to HelloWorld.c" # automatically stage modified or deleted files, except new files, and then commit $ git commit -a -m "Modified foo.php and removed bar.php" + +# change last commit (this deletes previous commit with a fresh commit) +$ git commit --amend -m "Correct message" ``` ### diff @@ -300,8 +300,8 @@ Display commits to the repository. # Show all commits $ git log -# Show X number of commits -$ git log -n 10 +# Show only commit message & ref +$ git log --oneline # Show merge commits only $ git log --merges -- cgit v1.2.3 From 9e605ee35ced12a77f0c0c666c0019d40eaaeea6 Mon Sep 17 00:00:00 2001 From: Ayush Date: Tue, 6 Oct 2015 01:06:15 +0530 Subject: Git: fixed typo --- git.html.markdown | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/git.html.markdown b/git.html.markdown index e20a4b88..b1347309 100644 --- a/git.html.markdown +++ b/git.html.markdown @@ -74,7 +74,7 @@ other repositories, or not! ### Branch A branch is essentially a pointer to the last commit you made. As you go on -committing, this pointer will automatically update to ooint the latest commit. +committing, this pointer will automatically update to point the latest commit. ### HEAD and head (component of .git dir) @@ -141,7 +141,7 @@ $ git commit --help $ git init --help ``` -### ignore (set of) files +### ignore files To intentionally untrack file(s) & folder(s) from git. Typically meant for private & temp files which would otherwise be shared in the repository. -- cgit v1.2.3